Background and Objectives: The adoption of maternity services and postpartum modern contraception are the two most crucial components help to reduce both maternal and infant mortality; still, India is consistently struggling with it. This paper, therefore, aimed to examine the linkages between use of maternity services and postpartum modern contraceptive adoption. Methods: The required reproductive calendar data were extracted from the 2015-16 and 2019-21 National Family Health Survey (NFHS) datasets. The assessment was made based on a sample of currently married women aged 15-24 years who had given most recent childbirth in five years preceding the survey. For the analysis, a time-to-event approach was applied using the Kaplan-Meier survival statistic, Log-Rank Chi-square test and Cox-Proportional Hazard (Cox-PH) models.  Results: The Results revealed that the proportion of postpartum modern contraceptive uptake among young users increased by only 9%, from 33% in 2015-16 to 42% in 2019-21. The Cox-PH models reported that, in both NFHS waves, the associations between various components of maternity services and postpartum modern contraceptive uptake were strongly significant, even after controlling for selected socio-economic and demographic correlates. Conclusions: The Findings of this study reinforced the need for implementing integrated maternal-child health and family planning programs and for boosting effective family planning counselling by health professionals to promote and motivate young women with a desire to early adoption of modern contraception in subsequent months after a recent childbirth.